What happens if you removed the timing belt before setting cylinder to compression?
10-30-18, 04:56 AM
#1
Driver School Candidate
Thread Starter
Join Date: Oct 2018
Location: FL
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
What happens if you removed the timing belt before setting cylinder to compression?
I replaced my water pump and now am trying to install timing belt back. The belt is marked, but I didn't set compression to No. 1 cylinder before removing belt. What should I do now.
10-30-18, 07:50 AM
#2
Dysfunctional Veteran
You should always align the cams with the timing marks while the belt is still attatched. Also mark the old belt in line with timing marks in case you have to put it back on for some reason.
In theory, if you have not moved any of the sprockets, you can put the belt on and as long as its tight, disregard the timing marks. If you don't move either the cams or the crank, the engine will start and run just fine. But that can be a gamble. If any of the sprockets move, even 1/2", you will be off a tooth. Also, this only works if your timing belt wasn't stretched and your timing wasn't already slightly off.
The only way to discern TDC without the belt on, is to pull the #1 spark plug and put in a compression test gauge. Rotate the crankshaft around until #1 has full compression. This is TDC. Then, Align the crankshaft and camshaft timing marks from that point, with the marks on the block and timing cover.
In theory, if you have not moved any of the sprockets, you can put the belt on and as long as its tight, disregard the timing marks. If you don't move either the cams or the crank, the engine will start and run just fine. But that can be a gamble. If any of the sprockets move, even 1/2", you will be off a tooth. Also, this only works if your timing belt wasn't stretched and your timing wasn't already slightly off.
The only way to discern TDC without the belt on, is to pull the #1 spark plug and put in a compression test gauge. Rotate the crankshaft around until #1 has full compression. This is TDC. Then, Align the crankshaft and camshaft timing marks from that point, with the marks on the block and timing cover.
10-30-18, 08:02 AM
#3
Driver School Candidate
Thread Starter
Join Date: Oct 2018
Location: FL
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
You should always align the cams with the timing marks while the belt is still attatched. Also mark the old belt in line with timing marks in case you have to put it back on for some reason.
In theory, if you have not moved any of the sprockets, you can put the belt on and as long as its tight, disregard the timing marks. If you don't move either the cams or the crank, the engine will start and run just fine. But that can be a gamble. If any of the sprockets move, even 1/2", you will be off a tooth. Also, this only works if your timing belt wasn't stretched and your timing wasn't already slightly off.
The only way to discern TDC without the belt on, is to pull the #1 spark plug and put in a compression test gauge. Rotate the crankshaft around until #1 has full compression. This is TDC. Then, Align the crankshaft and camshaft timing marks from that point, with the marks on the block and timing cover.
In theory, if you have not moved any of the sprockets, you can put the belt on and as long as its tight, disregard the timing marks. If you don't move either the cams or the crank, the engine will start and run just fine. But that can be a gamble. If any of the sprockets move, even 1/2", you will be off a tooth. Also, this only works if your timing belt wasn't stretched and your timing wasn't already slightly off.
The only way to discern TDC without the belt on, is to pull the #1 spark plug and put in a compression test gauge. Rotate the crankshaft around until #1 has full compression. This is TDC. Then, Align the crankshaft and camshaft timing marks from that point, with the marks on the block and timing cover.
Thank you very much for your response. Wee have decided to replace the head gaskets as well, but will make sure the compression is set. Both belts were marked prior to taking off.
Thread
Thread Starter
Forum
Replies
Last Post
mooseboy84
ES - 1st to 4th Gen (1990-2006)
3
10-31-15 11:35 PM
rx7guy
LS - 1st and 2nd Gen (1990-2000)
1
04-29-09 12:27 PM